bansama: GOG really need to do the same for Japanese Yen. That's been tanking in relation to the US dollar for almost a year now. It's at the point where Steam (using JPY) is significantly cheaper than GOG. There's been a few times in the last week or two that Witcher 3 has been almost $10 cheaper on Steam. So hopefully GOG start offering regional pricing in the same regions Steam does, if they want to seriously compete.
It's completely normal that when value of currency A falls in relation to currency B, then people from country A can buy less products. Why should it be any different with games?
When the value of pound sterling fell to almost 1 euro everyone here was happy that they could buy cheaply from the UK. But it's a two way street, so when the value of euro fell, buying from abroad becomes more "expensive".
There are two ways of doing multiple currency sales. If GoG does what you ask (keep fixed prices in all currencies like steam does), then one part of the users will
always be paying more than the other (except in the rare cases when the price rate happens to be exactly same as the exchange rate). The second way (the one GoG uses now* for euro and pound sterling) is much better. The prices change as the exchange rate changes. For me it means that the euro price increased as the value of euro decreased, but the euro prices will go down again should the euro be stronger. I'm still paying the same price as someone who's buying in USD or GBP.
If GoG fixed the prices like steam, then as soon as CAD or YEN gets stronger again, you'd start complaining that it's unfair that your game is more expensive than the ones sold in USD. But it's either or. You can't have it both ways.
That said I fully want GoG to introduce payment in canadian dollars, yen, australian dollars, polish zloty and any other currency. It will save on the exchange fees that banks/paypal/credit cards charge. Just keep the prices same across all currencies (using weekly update exchange rates; just like GoG does now) and change the prices as the exchange rates change.
*Except for Russia, unfortunately; but that's a different issue of giving in to people who claim it will be pirated otherwise